/*
 * Copyright 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.cloud.all.security.oauth2.client.test;

import cn.cloud.all.security.oauth2.resource.*;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Annotation to signal that an OAuth2 authentication should be created and and provided to the enclosing scope (method
 * or class). Used at the class level it will apply to all test methods (and {@link BeforeOAuth2Context} initializers).
 * Used at the method level it will apply only to the method, overriding any value found on the enclosing class.
 *
 * @author Dave Syer
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE, ElementType.METHOD})
public @interface OAuth2ContextConfiguration {

    /**
     * The resource type to use when obtaining an access token. The value provided must be a concrete implementation of
     * {@link OAuth2ProtectedResourceDetails}. An instance will be constructed by the test framework and used to set up
     * an OAuth2 authentication context. The strategy used for instantiating the value provided might vary depending on
     * the consumer. Defaults to the value of {@link resource()} if not provided.
     *
     * @return the resource type to use
     * @see Password
     * @see Implicit
     * @see ClientCredentials
     */
    Class<? extends OAuth2ProtectedResourceDetails> value() default OAuth2ProtectedResourceDetails.class;

    /**
     * The resource type to use when obtaining an access token. Defaults to {@link Password}. Intended to be used as an
     * alias for {@link #value()}.
     *
     * @return the resource type to use
     */
    Class<? extends OAuth2ProtectedResourceDetails> resource() default Password.class;

    class ResourceHelper {
        public static void initialize(OAuth2ProtectedResourceDetails source, BaseOAuth2ProtectedResourceDetails target) {
            target.setClientId(source.getClientId());
            target.setClientSecret(source.getClientSecret());
            target.setScope(source.getScope());
            target.setId(source.getId());
            target.setAccessTokenUri(source.getAccessTokenUri());
        }
    }

    /**
     * Set up an OAuth2 context for this test using client credentials grant type
     */
    static class ClientCredentials extends ClientCredentialsResourceDetails {
        public ClientCredentials(TestAccounts testAccounts) {
            ClientCredentialsResourceDetails resource = testAccounts.getDefaultClientCredentialsResource();
            ResourceHelper.initialize(resource, this);
        }
    }

    /**
     * Set up an OAuth2 context for this test using resource owner password grant type
     */
    static class Password extends ResourceOwnerPasswordResourceDetails {
        public Password(TestAccounts testAccounts) {
            ResourceOwnerPasswordResourceDetails resource = testAccounts.getDefaultResourceOwnerPasswordResource();
            ResourceHelper.initialize(resource, this);
            setUsername(resource.getUsername());
            setPassword(resource.getPassword());
        }
    }

    /**
     * Set up an OAuth2 context for this test using implicit grant type
     */
    static class Implicit extends ImplicitResourceDetails {
        public Implicit(TestAccounts testAccounts) {
            ImplicitResourceDetails resource = testAccounts.getDefaultImplicitResource();
            ResourceHelper.initialize(resource, this);
            setPreEstablishedRedirectUri(resource.getPreEstablishedRedirectUri());
        }
    }

    /**
     * Flag to indicate whether the access token should be initialized before the test method. If false then the test
     * method should access the protected resource or explicitly grab the access token before trying to use it. Default
     * is true, so test methods can just grab the access token if they need it.
     *
     * @return flag to indicate whether the access token should be initialized before the test method
     */
    boolean initialize() default true;

}